/* Definitions for SH running Linux-based GNU systems using ELF Copyright (C) 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc. Contributed by Kazumoto Kojima This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Run-time Target Specification. */ #undef TARGET_VERSION #define TARGET_VERSION fputs (" (SH GNU/Linux with ELF)", stderr); /* We're not SYSVR4, not having /usr/ccs */ #undef MD_EXEC_PREFIX #undef MD_STARTFILE_PREFIX /* This was defined in linux.h. Define it here also. */ #define HANDLE_PRAGMA_PACK_PUSH_POP /* Don't assume anything about the header files. */ #define NO_IMPLICIT_EXTERN_C /* The GNU C++ standard library requires that these macros be defined. */ #undef CPLUSPLUS_CPP_SPEC #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)" /* Enable DWARF 2 exceptions. */ #undef DWARF2_UNWIND_INFO #define DWARF2_UNWIND_INFO 1 /* ??? Current SH linux linker has a problem for DW_EH_PE_textrel. */ #undef ASM_PREFERRED_EH_DATA_FORMAT #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \ (flag_pic \ ? ((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4 \ : DW_EH_PE_absptr) #undef SUBTARGET_CPP_SPEC #define SUBTARGET_CPP_SPEC "\ %{posix:-D_POSIX_SOURCE} \ %{pthread:-D_REENTRANT -D_PTHREADS} \ " #define TARGET_OS_CPP_BUILTINS() \ do { \ builtin_define_std ("unix"); \ builtin_define ("__gnu_linux__"); \ builtin_define_std ("linux"); \ builtin_assert ("system=linux"); \ builtin_assert ("system=unix"); \ builtin_assert ("system=posix"); \ } while (0) #undef TARGET_DEFAULT #define TARGET_DEFAULT \ (TARGET_CPU_DEFAULT | USERMODE_BIT | TARGET_ENDIAN_DEFAULT) #define TARGET_ASM_FILE_END file_end_indicate_exec_stack #undef SUBTARGET_LINK_EMUL_SUFFIX #define SUBTARGET_LINK_EMUL_SUFFIX "_linux" #undef SUBTARGET_LINK_SPEC #define SUBTARGET_LINK_SPEC \ "%{shared:-shared} \ %{!static: \ %{rdynamic:-export-dynamic} \ %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \ %{static:-static}" #undef LIB_SPEC #define LIB_SPEC \ "%{pthread:-lpthread} \ %{shared: -lc} \ %{!static:-rpath-link %R/lib:%R/usr/lib} \ %{!shared: \ %{mieee-fp:-lieee} \ %{profile:-lc_p} %{!profile: -lc}}" #if defined(HAVE_LD_EH_FRAME_HDR) #undef LINK_EH_SPEC #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} " #endif #undef STARTFILE_SPEC #if defined HAVE_LD_PIE #define STARTFILE_SPEC \ "%{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \ crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}" #else #define STARTFILE_SPEC \ "%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \ crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}" #endif #undef ENDFILE_SPEC #define ENDFILE_SPEC \ "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s" #define LINK_GCC_C_SEQUENCE_SPEC \ "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}" /* Output assembler code to STREAM to call the profiler. */ #undef FUNCTION_PROFILER #define FUNCTION_PROFILER(STREAM,LABELNO) \ do { \ if (flag_pic) \ { \ fprintf (STREAM, "\tmov.l\t3f,r1\n"); \ fprintf (STREAM, "\tmova\t3f,r0\n"); \ fprintf (STREAM, "\tadd\tr1,r0\n"); \ fprintf (STREAM, "\tmov.l\t1f,r1\n"); \ fprintf (STREAM, "\tmov.l\t@(r0,r1),r1\n"); \ } \ else \ fprintf (STREAM, "\tmov.l\t1f,r1\n"); \ fprintf (STREAM, "\tsts.l\tpr,@-r15\n"); \ fprintf (STREAM, "\tmova\t2f,r0\n"); \ fprintf (STREAM, "\tjmp\t@r1\n"); \ fprintf (STREAM, "\tlds\tr0,pr\n"); \ fprintf (STREAM, "\t.align\t2\n"); \ if (flag_pic) \ { \ fprintf (STREAM, "1:\t.long\tmcount@GOT\n"); \ fprintf (STREAM, "3:\t.long\t_GLOBAL_OFFSET_TABLE_\n"); \ } \ else \ fprintf (STREAM, "1:\t.long\tmcount\n"); \ fprintf (STREAM, "2:\tlds.l\t@r15+,pr\n"); \ } while (0) /* Do code reading to identify a signal frame, and set the frame state data appropriately. See unwind-dw2.c for the structs. */ #ifdef IN_LIBGCC2 #include #include #include "insn-constants.h" # if defined (__SH5__) #define SH_DWARF_FRAME_GP0 0 #define SH_DWARF_FRAME_FP0 (__SH5__ == 32 ? 245 : 77) #define SH_DWARF_FRAME_XD0 289 #define SH_DWARF_FRAME_BT0 68 #define SH_DWARF_FRAME_PR 241 #define SH_DWARF_FRAME_PR_MEDIA 18 #define SH_DWARF_FRAME_GBR 238 #define SH_DWARF_FRAME_MACH 239 #define SH_DWARF_FRAME_MACL 240 #define SH_DWARF_FRAME_PC 64 #define SH_DWARF_FRAME_SR 65 #define SH_DWARF_FRAME_FPUL 244 #define SH_DWARF_FRAME_FPSCR 243 #else #define SH_DWARF_FRAME_GP0 0 #define SH_DWARF_FRAME_FP0 25 #define SH_DWARF_FRAME_XD0 87 #define SH_DWARF_FRAME_PR 17 #define SH_DWARF_FRAME_GBR 19 #define SH_DWARF_FRAME_MACH 20 #define SH_DWARF_FRAME_MACL 21 #define SH_DWARF_FRAME_PC 16 #define SH_DWARF_FRAME_SR 22 #define SH_DWARF_FRAME_FPUL 23 #define SH_DWARF_FRAME_FPSCR 24 #endif /* defined (__SH5__) */ #if defined (__SH5__) /* MD_FALLBACK_FRAME_STATE_FOR is not yet defined for SHMEDIA. */ #else /* defined (__SH5__) */ #if defined (__SH3E__) || defined (__SH4__) #define SH_FALLBACK_FRAME_FLOAT_STATE(SC, FS, CFA) \ do { \ int i_, r_; \ \ r_ = SH_DWARF_FRAME_FP0; \ for (i_ = 0; i_ < 16; i_++) \ { \ (FS)->regs.reg[r_+i_].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[r_+i_].loc.offset \ = (long)&((SC)->sc_fpregs[i_]) - (CFA); \ } \ \ r_ = SH_DWARF_FRAME_XD0 ; \ for (i_ = 0; i_ < 8; i_++) \ { \ (FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[i_].loc.offset \ = (long)&((SC)->sc_xfpregs[2*i_]) - (CFA); \ } \ \ (FS)->regs.reg[SH_DWARF_FRAME_FPUL].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[SH_DWARF_FRAME_FPUL].loc.offset \ = (long)&((SC)->sc_fpul) - (CFA); \ (FS)->regs.reg[SH_DWARF_FRAME_FPSCR].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[SH_DWARF_FRAME_FPSCR].loc.offset \ = (long)&((SC)->sc_fpscr) - (CFA); \ } while (0) #else #define SH_FALLBACK_FRAME_FLOAT_STATE(SC, FS, CFA) #endif #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \ do { \ unsigned char *pc_ = (CONTEXT)->ra; \ struct sigcontext *sc_; \ long new_cfa_; \ int i_; \ \ /* mov.w 1f,r3; trapa #0x10; 1: .short 0x77 (sigreturn) */ \ /* mov.w 1f,r3; trapa #0x10; 1: .short 0xad (rt_sigreturn) */ \ /* Newer kernel uses pad instructions to avoid an SH-4 core bug. */\ /* mov.w 1f,r3; trapa #0x10; or r0,r0; or r0,r0; or r0,r0; or r0,r0;\ or r0,r0; 1: .short 0x77 (sigreturn) */ \ /* mov.w 1f,r3; trapa #0x10; or r0,r0; or r0,r0; or r0,r0; or r0,r0;\ or r0,r0; 1: .short 0xad (rt_sigreturn) */ \ if (((*(unsigned short *) (pc_+0) == 0x9300) \ && (*(unsigned short *) (pc_+2) == 0xc310) \ && (*(unsigned short *) (pc_+4) == 0x0077)) \ || (((*(unsigned short *) (pc_+0) == 0x9305) \ && (*(unsigned short *) (pc_+2) == 0xc310) \ && (*(unsigned short *) (pc_+14) == 0x0077)))) \ sc_ = (CONTEXT)->cfa; \ else if (((*(unsigned short *) (pc_+0) == 0x9300) \ && (*(unsigned short *) (pc_+2) == 0xc310) \ && (*(unsigned short *) (pc_+4) == 0x00ad)) \ || (((*(unsigned short *) (pc_+0) == 0x9305) \ && (*(unsigned short *) (pc_+2) == 0xc310) \ && (*(unsigned short *) (pc_+14) == 0x00ad)))) \ { \ struct rt_sigframe { \ struct siginfo info; \ struct ucontext uc; \ } *rt_ = (CONTEXT)->cfa; \ sc_ = (struct sigcontext *) &rt_->uc.uc_mcontext; \ } \ else \ break; \ \ new_cfa_ = sc_->sc_regs[15]; \ (FS)->cfa_how = CFA_REG_OFFSET; \ (FS)->cfa_reg = 15; \ (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \ \ for (i_ = 0; i_ < 15; i_++) \ { \ (FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[i_].loc.offset \ = (long)&(sc_->sc_regs[i_]) - new_cfa_; \ } \ \ (FS)->regs.reg[SH_DWARF_FRAME_PR].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[SH_DWARF_FRAME_PR].loc.offset \ = (long)&(sc_->sc_pr) - new_cfa_; \ (FS)->regs.reg[SH_DWARF_FRAME_SR].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[SH_DWARF_FRAME_SR].loc.offset \ = (long)&(sc_->sc_sr) - new_cfa_; \ (FS)->regs.reg[SH_DWARF_FRAME_GBR].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[SH_DWARF_FRAME_GBR].loc.offset \ = (long)&(sc_->sc_gbr) - new_cfa_; \ (FS)->regs.reg[SH_DWARF_FRAME_MACH].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[SH_DWARF_FRAME_MACH].loc.offset \ = (long)&(sc_->sc_mach) - new_cfa_; \ (FS)->regs.reg[SH_DWARF_FRAME_MACL].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[SH_DWARF_FRAME_MACL].loc.offset \ = (long)&(sc_->sc_macl) - new_cfa_; \ \ SH_FALLBACK_FRAME_FLOAT_STATE(sc_, (FS), new_cfa_); \ \ /* The unwinder expects the PC to point to the following insn, \ whereas the kernel returns the address of the actual \ faulting insn. */ \ sc_->sc_pc += 2; \ (FS)->regs.reg[SH_DWARF_FRAME_PC].how = REG_SAVED_OFFSET; \ (FS)->regs.reg[SH_DWARF_FRAME_PC].loc.offset \ = (long)&(sc_->sc_pc) - new_cfa_; \ (FS)->retaddr_column = SH_DWARF_FRAME_PC; \ goto SUCCESS; \ } while (0) #endif /* defined (__SH5__) */ #endif /* IN_LIBGCC2 */ /* For SH3 and SH4, we use a slot of the unwind frame which correspond to a fake register number 16 as a placeholder for the return address in MD_FALLBACK_FRAME_STATE_FOR and its content will be read with _Unwind_GetGR which uses dwarf_reg_size_table to get the size of the register. So the entry of dwarf_reg_size_table corresponding to this slot must be set. To do this, we redefine DBX_REGISTER_NUMBER so as to return itself for 16. */ #undef DBX_REGISTER_NUMBER #define DBX_REGISTER_NUMBER(REGNO) \ ((! TARGET_SH5 && (REGNO) == 16) ? 16 : SH_DBX_REGISTER_NUMBER (REGNO))